

South Korea is being overrun by a zombie outbreak, and many countries are evacuating survivors before quarantining the peninsula in Busan. ROKMC officer Jung-seok drives his sister, her husband Chul-min, and their young son Dong-hwan to an evacuation ship. On the way, they encounter a distressed couple with a young daughter, but Jung-seok refuses to help them after noticing the man bleeding. They board the ship, but an infected man turns into a zombie and bites several people in their cabin, including Dong-hwan.